Facile green synthesis of carbon quantum dots and biomass-derived activated carbon from banana peels: synthesis and investigation

Nguyen, Nghia Trong; Le, Phuoc Anh; Phung, Thi Viet Bac

doi:10.1007/s13399-020-00839-2

Cited by 70 publications

(25 citation statements)

References 39 publications

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“…1S (Supplementary information) was observed in ve-carbon states as follows; C-C and sp 2 at 284 eV, C-O, C-N at 285.5 eV, C-C at 287.8 eV, O-C = O, C = O at 289 eV. The Si2p exhibited one peak at 102 eV, which indicates Si-O and the O1s shown two oxygen states of C = O at 532 eV and C-O at 534 eV.The spectra states are consistent with the other literature as reported[4,11,27, 28]. The denoted functional groups of O = C, C-O-H, C-O-C, among others, are typical structures of phenolic, ester, quinine, lactonic, carboxyl group from the surface of the materials.…”

supporting

confidence: 90%

“…This also implies that the materials have excellent charge-discharge character [24,34]. The exhibited symmetrical rectangular shapes showed better performance than most reported results in the literature [11,25,30,31]. The CVs after stability demonstrated less or no exponential for the faradaic process, indicating no pseudocapacitance after holding the electrode materials at the high potential for a total of 130 h, as shown in Figure S3(a-f) (supplementary information) at a scan rate of 5 mV/s.…”

Section: R-c X -O + Hmentioning

confidence: 49%

“…Other materials, which include African maize corn cob with SSA of 254 m 2 /g and a speci c capacitance of 456 F/g at a speci c current of 0.25 A/g [1], waste tea with SSA of 294.6 m 2 /g exhibited a speci c capacitance of 199 F/g at the speci c current of 0.5A/g, the SSA range of 1308 m 2 /g gave a speci c capacitance of 140 F/g at a current density of 0.1A/g from Waste tea [9]. Rosewood and corn cob [10], banana peels [11], corn husk with SSA of 1370 m 2 /g, and a speci c capacitance of 127 F/g at 1 A/g [8] were reported. Pinecones with SSA of 1169.31 m 2 /g show a speci c capacitance of 43 F/g at 0.5 A/g [4], coconut shell exhibited SSA of 11614 m 2 /g resulted in a high capacitance of 426 F/g at 0.5 A/g with electronic conductivity of 11.43 S/cm [12].…”

Section: Introductionmentioning

confidence: 99%

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Cobs Porous Carbon-Based Materials With High Energy And Excellent Cycle Stability For Supercapacitor Applications

Kigozi

Koech

Orisekeh

et al. 2021

Preprint

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Background and purpose: For application in supercapacitors, improving the efficiency of the electrode materials is the most important for obtaining high performance. Porous carbon with suitable architectures is reliable for improved electrochemical capacitors. In this study, we optimized the maize cobs as a potential abundant precursor for the production of porous carbon supercapacitor applications. This research study aimed to advance on the activation method for Activation of the biomass and to up-cycling agricultural biomass into carbon-based porous materials for supercapacitor electrode application. The carbonized samples were kept in a desiccator for 3 hours to allow intercalation and interaction of the carbon lattice expansion by K+ ion before Activation [Topic, RQ]. Results: The physical and chemical characterization of the synthesized materials was carried out several techniques for determining different properties of the activated carbon from maize cobs, including; structural-functional groups, morphology, chemical composition, physical properties and electrochemical performance. The results revealed surface structure with oxygen-based functional groups carried by XPS and FTIR, the amorphous nature by XRD, high-temperature stability to degradation by TGA/DSC, among others. Also, the structural characterization revealed a BET specific surface area of 1443.94 m2/g with a pore volume of 0.7915cm3/g. Symmetric devices based on the produced materials delivered a specific capacitance of 358.7F/g with an energy density of 12.45 Wh/kg and a corresponding power density of 250 W/kg at 0.5A/g [Outcome]. Conclusions: The as-prepared electrodes exhibited excellent stability with the capacitance retention of 99% at the maximum potential for a repeated 10hr to a total of 130 h. The industries can commercialise these activated carbon materials for application in energy storage systems and water purification due to their porosity and high-temperature resistance to degradation [Contributions].

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supporting

confidence: 90%

Section: R-c X -O + Hmentioning

confidence: 49%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Cobs Porous Carbon-Based Materials With High Energy And Excellent Cycle Stability For Supercapacitor Applications

Kigozi

Koech

Orisekeh

et al. 2021

Preprint

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“… 56 Moreover, the plot of the N 2 isotherm at a low ratio of P / P 0 < 0.45 indicates the micropores. 57 In summary, the WO 3 ·H 2 O nanoflowers have a 2D plates structure containing micropores, macropores, and also mesopores. Figure 4 d shows the pore-size distribution based on the Barrett–Joyner–Halenda analysis from N 2 adsorption–desorption isotherm.…”

Section: Resultsmentioning

confidence: 95%

Computation and Investigation of Two-Dimensional WO₃·H₂O Nanoflowers for Electrochemical Studies of Energy Conversion and Storage Applications

Tran

et al. 2022

ACS Omega

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The aim of this study is to prepare a two-dimensional (2D) WO 3 ·H 2 O nanostructure assembly into a flower shape with good chemical stability for electrochemical studies of catalyst and energy storage applications. The 2D-WO 3 ·H 2 O nanoflowers structure is created by a fast and simple process at room condition. This cost-effective and scalable technique to obtain 2D-WO 3 ·H 2 O nanoflowers illustrates two attractive applications of electrochemical capacitor with an excellent energy density value of 25.33 W h kg –1 for high power density value of 1600 W kg –1 and good hydrogen evolution reaction results (low overpotential of 290 mV at a current density of 10 mA cm –2 with a low Tafel slope of 131 mV dec –1 ). A hydrogen evolution reaction (HER) study of WO 3 in acidic media of 0.5 M H 2 SO 4 and electrochemical capacitor (supercapacitors) in 1 M Na 2 SO 4 aqueous electrolyte (three electrode system measurements) demonstrates highly desirable characteristics for practical applications. Our design for highly uniform 2D-WO 3 ·H 2 O as catalyst material for HER and active material for electrochemical capacitor studies offers an excellent foundation for design and improvement of electrochemical catalyst based on 2D-transition metal oxide materials.

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“…The biomass materials are gradually replacing fossil fuels to become the promising materials in the context of exhausted fossil fuels. Nowadays, the biomass derived porous carbon is centrally researched for energy storage as fuel cell, batteries and supercapacitors due to abundant source, easy harvesting and stable output [1][2][3][4][5]. Among them, the porous carbon materials for the electrodes in the supercapacitors have attracted intensive research recently due to replace the commercial activated carbon from charcoal with low conductivity, low speci c surface area and negative effects on the environment.…”

Section: Introductionmentioning

confidence: 99%

Assessing Strong Consistency of Symmetrical Solid-state Supercapacitors Based on Three-dimensional Porous Carbon Material

Phung

et al. 2021

Preprint

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Three-dimensional (3D) porous carbon material enhances the electrochemical performance of symmetrical solid-state supercapacitors which are prepared by using abundant biomass waste as electrodes and (PVA-Li2SO4) gel polymer electrolyte. A saving and simple carbonization method with KOH chemical activation is developed for synthesizing highly porous carbon from peanut shell with high specific surface area of 1348 m2 g–1, which can be reused the chemical activation solution. The electrodes making by such three-dimensional porous carbon in a 1 M Li2SO4 electrolyte demonstrates a maximum specific capacitance of 386 F g–1 at current density of 2 A g–1, energy density and power density of 53.61 Wh k g–1 and 1000 W kg–1, respectively. The symmetrical solid state supercapacitors with sandwich structure of (3D porous carbon P/PVA-Li2SO4/3D porous carbon P) exhibits a maximum specific capacitance of 116 F g-1 at current density of 0.5 A g–1. The energy density and power density are the value of 9 W h kg–1 and 380 W kg–1, respectively. Further, the supercapacitors also demonstrate good cycling stability 89 % retention after 7000 cycles.

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Facile green synthesis of carbon quantum dots and biomass-derived activated carbon from banana peels: synthesis and investigation

Cited by 70 publications

References 39 publications

Cobs Porous Carbon-Based Materials With High Energy And Excellent Cycle Stability For Supercapacitor Applications

Cobs Porous Carbon-Based Materials With High Energy And Excellent Cycle Stability For Supercapacitor Applications

Computation and Investigation of Two-Dimensional WO₃·H₂O Nanoflowers for Electrochemical Studies of Energy Conversion and Storage Applications

Assessing Strong Consistency of Symmetrical Solid-state Supercapacitors Based on Three-dimensional Porous Carbon Material

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Facile green synthesis of carbon quantum dots and biomass-derived activated carbon from banana peels: synthesis and investigation

Cited by 70 publications

References 39 publications

Cobs Porous Carbon-Based Materials With High Energy And Excellent Cycle Stability For Supercapacitor Applications

Cobs Porous Carbon-Based Materials With High Energy And Excellent Cycle Stability For Supercapacitor Applications

Computation and Investigation of Two-Dimensional WO3·H2O Nanoflowers for Electrochemical Studies of Energy Conversion and Storage Applications

Assessing Strong Consistency of Symmetrical Solid-state Supercapacitors Based on Three-dimensional Porous Carbon Material

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Computation and Investigation of Two-Dimensional WO₃·H₂O Nanoflowers for Electrochemical Studies of Energy Conversion and Storage Applications